Bit connection for bladed tools



April 7, 1931- J. H. WILY I BIT CONNECTION FOR BLADED TOOLS Filed Feb.14, 1929 M... M 41:5 65 gY ATTORIflEYS' Patented Apr. 7, 1931 PATENTFFICE JAMES H. WILY, OF BETHLEHEM, PENNSYLVANIA BIT CONNECTIONFOR-BLADED TOOLS Application filed February 14, 1929. Serial No.339,890."

The invention relates to bladed tools such as shovels, ice cutters, turfcutters and the like, wherein a separate bit, usually of special hardmetal, is employed to serve as the cutting 5 or wearing member. r

The primary object of the invention is to provide connection between thebit and blade of a tool of the above nature, which will be strong anddurable, particularly in absorbing 10 or withstand ng sudden shocksencountered for examplewhen the tool is used for chopping, and twistingstrains. And where fasteningdevices such as rivets are employed toassist in holding together the blade and bit, the connection preferablyis arranged to absorb shocks of the above nature without transmittingthem through the rivets or otherwise subjecting the rivets thereto.Further obj ects of the invention will be in part obvious and in partspecifically pointed out in the annexed specification which, taken inconjunction with the accompanying drawings, discloses a preferredembodiment of the invention; such embodiment however is to be consideredas merely illustrative of its principles. In the drawings:

Fig. 1 is a plan view of a tool blade and bit connected in accordance.with the invention.

Fig. 2 is a section on line 22 of Fig. 1.

The invention is illustrated as applied to a sheet metal shovel blade 1,and a bit 2 which serves as the cutting or wearing member, such bitbeing usually made of fairly hard and tough steel. In the illustratedform of the invention, the forward part of the blade (i. e. the part ofthe blade near the bit), is bent back as at 3, and then bent outwardlyas at 4, to provide a transverse shoulder.

The rear portion 5 of the bit lies along the bent back part 3 of theblade, and has its rear edge 6 seated against the above mentionedshoulder 4. Preferably also the forward part 7 of the rear portion ofthe bit is bent to lie against the first bend (between parts 1 and 3) ofthe blade, whereby the body or forward portion of the bit 2 liessubstantially in the plane of the body of blade 1 and abuts the latter.1 Thus when the tool is used for chopping, the sudden shocks aretransmitted directly from the bit either to the shoulder 4 of the blade,or from the bent part '7 of the bit to the blade, if both of the abovedescribed features of construction are employed.

Usually fastening devices such as rivets 8 will be employed to assist inholding together-the bit and blade, and it will be noted that the abovedescribed features of construction relieve the rivets of any lengthwiseshocks which otherwise would tend to bend or shear them off, or crumpleup the walls of the holes through which they pass. I prefer to maketheholes 9 of the bit, through which the rivets 8 pass, larger in diameterthan the rivets, to insure that the rivets will be relieved oflengthwise stresses as above described. i

I prefer also to provide a further bent part 10 in the blade, whichextends forwardly F from shoulder 4 above described, whereby the parts3, 1 and 10 of the blade form in effect a U shaped pocket within whichthe rear portionof the bit is received, and the forward edge 11 of thepart 10, may be bent to 7 lie against the above described bent part 7 ofthe bit. The shoulder 4, as well as the bent parts 7 and 11 when thelatter are employed, tend strongly to prevent the bit from rocking ortwisting with respect to the blade, while the connection as a wholereinforces the blade to a substantial extent. It will be understood thatthe bent parts 3, 4 and 10 might be separate from the body of the blade1, but for most purposes I prefer to make them integral therewith.

While a specificembodiment of'the invention has been disclosed, itshould beunderstood that many changes may be made therein withoutdeparting from its main features, as set forth in the appended claims. Iclaim: 1. In a tool of the class described, a blade having its forwardedge bent back and then forwardly to provide a U shaped pocket, and

a hard metal bit for said tool having its rear portion received withinsaid U shaped pocket with its rear edge seated against the base of theU. V r

. i 2. In a toolof the class described, a blade having its forward edgebent back and then forwardly to provide a U shaped pocket, and a hardmetal bit for said tool having its rear portion received within said Ushaped pocket with its rear edge seated against the base of the U, theforward part of such rear portion of the bit being bent to lie againstthe first bend in the blade.

3. In a tool of the class described, a blade having its forward edgebent back and then forwardly to provide a U shaped pocket, and a hardmetal bit for said tool having its rear portion received within said Ushaped pocket with its rear edge seated against the base of the U, theforward part of such rear portion of the bit being bent to lie againstthe first bend in the blade and the end of the outer leg of the U beingbent to lie against said bent part of the bit.

4. In a tool of the class described, a blade having its forward edgebent back and then outwardly to provide a transverse shoulder, a hardmetal bit for said tool having its rear portion lying along the bentback part of the blade and its rear edge seated againstsaid transverseshoulder, and fastening devices passing through alined holes in saidblade and bit.

5. In a tool of the class described, a blade having its forward edgebent back and then outwardly to provide a transverse shoulder, a hardmetal bit for said tool having its rear portion lying along the bentback part of the blade and its rear edge seated against said transverseshoulder, and fastening devices passing through alined holes in saidblade and bit, the holes in the bit being larger than the fasteningdevices.

6. In a tool of the class described, a blade having its forward edgebent back and then forwardly to provide a U shaped pocket, and a hardmetal bit for said tool having its rear portion received within said Ushaped pocket with its rear edge seated against the base of the U andfastening devices passing through alined holes in the blade proper, thesides of the U, and the bit.

7. In a tool of the class described, a blade having its forward edgebent back and then forwardly to provide a U shaped pocket, and a hardmetal bit for said tool having its rear portion received within said Ushaped pocket, means being provided for fastening the rear portion ofthe bit within said pocket.

8. In a tool of the class described, a: blade having its forward edgebent back and then forwardly to provide a U shaped pocket, and a hardmetal bit for said tool having its rear portion received within said Ushaped pocket, means being provided for fastening the rear portion ofthe bit within said pocket, said bit abutting an adjacent part of theblade to relieve the fastening means of lengthwise stresses.

9.= A blade fora tool of'the' class described having its front edge bentto the rear and then forwardly to provide a U-shaped pocket, and a metalbit having its rear portion received within said U-shaped pocket, saidbit being bent to abut the front bent edge of the blade so as to havethe projecting edge of the bit in substantially the same plane as theblade.

10. A blade for a tool of the class described having a dependingU-shaped pocket, and a metal bit having its rear portion positionedwithin said U-shaped pocket, said bit being bent intermediate its edgesto abut the front edge of the blade so as to have the projecting edge ofthe bit in substantially the same plane as the blade.

11. A blade for a tool of'the class described having a dependingU-shaped pocket, and a metal bit having its rear edge abutting, the baseof the pocket, said metal bit being bent intermediate its edges to abutthe front edge of the blade so as to have the projecting edge of the bitin substantially the same plane as the blade.

In testimony that I claim the foregoing, I have hereunto set my handthis 2nd day of February, 1929.

JAMES H. VVILY.

